大流行流感疫苗
Pandemic influenza vaccine
Pandemic influenza vaccines
平行间距
Parallel space
the space between two parallel lines
日间行为模式
Daytime behavioral pattern
束间间距
distance of adjacent scanning lines
右心室收缩时间间距
systolic time interval of the right ventricle
3类疟疾流行区
Three patterns of malaria-endemic area
A群和C群流行性脑脊髓膜炎
Group A and C epidemic cerebro-spinal meningitis